Ridge Alterations following Immediate Implant Placement and the Treatment of Bone Defects with Bio-Oss in an Animal Model

Kuo Mei Hsu, Byung Ho Choi, Chang Yong Ko, Han Sung Kim, Feng Xuan, Seung Mi Jeong

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Background: Conflicting data exist on the outcome of placing Bio-Oss® (Geitslich Pharm AG, Wolhausen, Switzerland) into extraction sockets. It is therefore relevant to study whether the incorporation of Bio-Oss into extraction sockets would influence bone healing outcome at the extraction sites. Purpose: The aim of this study was to assess peri-implant bone changes when implants were placed in fresh extraction sockets and the remaining defects were filled with Bio-Oss particles in a canine mandible model. Materials and Methods: Six mongrel dogs were used in the study. In one jaw quadrant of each animal, the fourth mandibular premolars were extracted with an elevation of the mucoperiosteal flap; implants were then placed in the fresh extraction sockets and the remaining defects were filled with Bio-Oss particles. After 4 months of healing, micro-computed tomography at the implant sites was performed. Osseointegration was calculated as the percent of implant surface in contact with bone. Additionally, bone height was measured in the peri-implant bone. Results: Average osseointegration was 28.5% (ranged between 14.8 and 34.2%). The mean crestal bone loss was 4.7±2.1mm on the buccal aspect, 0.4±0.5mm on the mesial aspect, 0.4±0.3mm on the distal aspect, and 0.3±0.4mm on the lingual aspect. Conclusion: The findings from this study demonstrated that the placement of implants and Bio-Oss® particles into fresh extraction sockets resulted in significant buccal bone loss with low osseointegration.

Original languageEnglish
Pages (from-to)690-695
Number of pages6
JournalClinical Implant Dentistry and Related Research
Issue number5
Publication statusPublished - 2012 Oct 1


All Science Journal Classification (ASJC) codes

  • Oral Surgery
  • Dentistry(all)

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